Vibrator



Sept. 4, 1951 A, J, RQUBAL 2,566,317

VIBRATOR Filed Aug. 5, 1946 INVENTOR 34 ATTORNEY Mia/xm 3. @20A/dyedPatented Sept. 4, 1951 Alexander J. Roubal, Milwaukee, Wis., .assigner:to `Allis'-.Chalmers Manufacturing '.Company, iMlwaukee,` Wis., acorporation of Delaware Application August' 3, 1946,.. Seria1sNo..(588;233

...8 Claims.'

.This .invention relates. to reciprocating motors and vibrators,particularly .of thetypein which aresiliently mounted .reeiprocablemass. element isfforeed to vibrate-relativeto armassive. reactionsupportby a periodic `force. Moreparticularly the inventionconcerns..reactionsupports i. and resilient. mountings for thereciprocable elementsv ofzsuch motors.`

Inzheavy machinerywhereza machine parthavinglsubstantialweightisndesignedto .be vibrated atszfrequencies on the .order oftwentyfve or more cycles per.secondifatappreciable-amplitudes, such ason the orderl of one to.thre'e 1sixtyfourths of'. an inch, the.provision .of a .isuitablefresilient mounting which willi be.stableyefcientnand durableis. a Vdiflicult problem.

v"Itis anobject .of lthe" .present-.invention to pro.- vide an improved,.-simple, durable, .resilient mounting arrangement forvibrating-'elements of reciprocating motors'.

Another object. concerns aan; improved:arrange--` ment: foremployment:ofatasteel. disks .asispring elements in a resilient:mountingforfa vibrated machine element. i

:Amore particular object :concerns amounting vfor diskV springsinanimproved vibratingLsystem,

in whichthe disks maybe:readilyzremovedfand inserted for tuning,inspection, and replacement.

The .above aand still Afurther objects which will befapparent fromareading of this specication can .best be carried`intopracticalaeiiect-as Jdescribed' hereinbelow with reference. to the;aecompanying drawing. in which like: referencer-characters indicate .thesame orisimilanpartsthroughoutlthe` several views,2and linfwhich:

Fig. l is a side-elevationof `areeder'devicev embodying the Apresentinvention;

Fig. `2.is a section of the vibratory. motor of Fig. 1 taken on line II-II offig. `1;

Fig. 3. is a fragmentary view insectionsimilar to Fig. .2 of a.modiedform .ofi motoristructure;

`Fig-.fi is a section ofthe vibratorymotor'of Fig. 3 taken on line INT-.IV;

Fig. 5 is adetailplanfviewof asprngfildisk; `and Fig. 6 is a detailplanview 'of a-.modiiiediform of Vspring disk.

The. invention` is. illustrated Ain the Adrawingas embodied ineavibratoryifeeder infwhich afeeder pan. I of Aconventionaltyperislmovablymounted with relation toandmaybe supported by a `'massiveframe 2. Frame Vl may be V'suspended by suitable cables 3; orsupportedinanyfsother suitable known manner, .from-a .basezor buildingstructure (not-eshown). .The weightzof thespanl maybe takenonrubbermountingsfdisuitablyzattachedfto frame 2 .or on anyother suitableknowndeviceY providing for relative movement of-panl and frame 2. If desiredthe pan I frame --2 may, of course, be supported independentlyin movablerelation to :each other in `any known manner .(not shown)-Anactuating-rodor spindle 5. is secured'` to pan I, preferably with its.axis inclined to the pan oor and passingapproximately through the eenL-terof ,gravity of thepanstructure. Theconnection-may be, as shown, by`afiange 'l detachably secured toa suitable surtaceonthe-panl, as bybolts 8,` or-.by any other suitablefknown fastening device.

Thespindle 6 is .preferablyprovided with la threaded shankport-iono andathreaded Aportion II of reduced diameter. A clamping `nut I2-with anannular..c1amping shoulder I3 is...arranged to threadedlyengage `shankportion 3, and.v a yokepiece |74; having. an. annular .clamping surfaceIG is `.arranged `to threadedly engage shank .portion I I.

.Spindle disconnected withiramez by aplurality ofannularspring 4disks`IFI `arranged in parallel.coaxialrelation with their center portions l8.clamped betweenthe surface loof nut IZAandthesurface IB .of yoke I4 in.axially fixed, coaxial-.relationto .spindle 6. Peripheral portions I9ofidisks Hare. clampedin axially. xed. relation betweenan internalshoulderl I in ahollowcylindrical spring retaining portion 22 of frameZand an.vannulariclamping.ring.23, in cylinder 22. -The clamping .ring.23 .may .be forced axially toward. shoulder 2|, laslloy suitable.clamping screws ...24 threadedly .engaging ab suitable internal flange2E o'f .cylinder- 22.

'Ihe cylindrical. spring retaining portion 22 of frame.2mayalternatively .be rcferredto in this speciiicationas anannular.spring seat.

.As .shown inthe drawing,an. axial `space is .provided .between theannularintermediate portions of .successive disks I.'I=as by use ofdiskshaving. thickened .centerand peripheral portions vI8 and I9..A..substantial1y equivalent alternative construction (notf-shown) wouldinvolve plainflat disks .with separate.spacerrings between the1peripheral .and .center portions. in place-.ot the integral thickened.spacer portions I3 and I B.

The frame .2 .is providedwith apart zlextending transversely across thecylindrical or ann-ulariportion` 22- and forming -a suitable frame for:one .of lthe `relatively movable parts .of 1a mechanism for applyingperiodic forcesto spindie 6. Preferably 'thisfmechanism is :constitutedby thelectromagnets y of an electromagnetic reciprocating motor, therelatively movable armature 29 of which may be connected to yoke pieceI4 as by force transmitting rods 3| Armature supporting means, such asleaf spring 32 parallel to and axially spaced from disks i1 mayV beemployed to permit motion of the armature along the main axis ofvibration, while preventing lateral deflections. It will be apparentthat this leaf spring 32 is only auxiliary to the main` site directionsalong its longitudinal axis.

Theportion 33 of frame 2 provides a mounting Patent:v

produced to move spindle 5 alternately in oppo- .y

surface for rubber mountings 4, and is provided Y with pointe. ofattachment 3d for' suspension cables 3.

In the preferred embodiment, shown in Figs. 1 and 2, a peripheral slot35 is provided in cylindrical portion 22 of frame 2. The purpose of slot36A is to provide for insertion and withdrawal of the disks Il, such asare shown in detail in Fig. 5. This may be accomplished without completeremoval of the pan i and spindle B, by disconnecting spindle (i from panl and yoke Ilso that it may be axially moved to the position shown indotted lines in Fig. 2, and inserting or removing disks laterallythrough the slot 35. The clamping screws 2A and nut i2 are, of course,loosened during the withdrawal and insertion of disks I1.

In the modified form shown in Figs. 3 and 4 disks I1 are constructedaccording to Fig. 6, with a slot 31 extending radially from the outerperiphery to the central opening and having a width at least as great asthe diameter of shank portion 9 of spindle 6. Disks of this type may beinserted and withdrawn without disconnecting spindle 6, pan l or yokepiece lli, merely by loosening clamp screws 24 and nut i2 and slippingthe disks il laterally through the slot 35. Disks l1 of course may berotated during assembly so VYthat the slots 31 may be located indifferent radial planes when clamped in operative position.

The purpose of the laminated disk spring arrangement is to provide atunable main spring assembly for a vibrating system which is intended tobe operated at or substantially at resonance with the forced impulses.The laminated disk spring of the invention is peculiarly suited tosystems involving considerable mass, where straight line vibration isdesired, for it provides a very stable mounting with great resistance tolateral displacement in all directions and a high spring rate indeection of the center portions of the disks along their arcs to eitherside of Va neutral plane. The disks are capable of storing greatenergies during dcilection from neutral in either direction, such storedenergies being released during recovery lfrom displacement and impartedto the vibrating element in phase with the driving force. The use of avaried number of disks provides for tuning the natural period of thesystem to resonance with the predetermined period of forced vibrationsapplied to the vibrated element. l Y

It will be understood that feeder pan I is by way of example only, asany body or'mass to be 4 vibrated may be operatively attached to spindle6 for vibration thereby, such as vibrating screens and other materialtreating and conveying devices and vibrating systems to Which it may bedesirable to convey forceably sustained vibrational movement.

Thus, While specific embodiments of the inven- 'tion are illustrated anddescribed, the invention will be understood to include all suchmodifications and equivalents as may be readily apparent to personsskilled in the art to which it appertains, within the scope of theappended claims. It is claimed and desired to secure by Letters 1. In avibrator of the type in which a reciprocable mass is resilientlysupported from a frame for vibration along an axis relative thereto, `amassive reaction frame having an annular spring retaining portion normalto the axis of vibration, a plurality of parallel coaxially alinedspring disks having their peripheral portions axially xed in said springretaining portion, and means connecting said reciprocable mass in fixedrelation to the center portions of said disks.

2., In a vibrator, a massive reaction frame having an annular springseat normal toan' axis of reciprocation, a plurality ofparallel'coaxially aimed spring disks connected in xed relation to said'seat adjacent their peripheral edges', a reciprocable element connectedin fixed relation to the central portions of said disks and means forapplying periodic forces 'to said element to reciprocate said elementrelative to'said frame.

3. Ina vibrator, a massive reaction frame, a spring retaining cylinderrigidly attached to said Y frame and having an annular shoulder atoneend, a series of spring disks stacked coaxially in said cylinder,clamping means in said cylinder for engaging said series of disksadjacent its periphery to clamp said series of disks axially againstsaid annular shoulder, a reciprocable element connected in fixedrelation to the central portions of said disks, whereby said seriesV ofdisks support said reciprocable element for vibration along their commonaxis and means for applying periodic reciprocating forces to saidelement to reciprocate said element relative to said frame.

4. In a vibrator, a 'massive frame element, a reciprocable element,means for reciprocating said reciprocable element along an axis relativeto said frame element, a plurality of parallel co-' axially stackedspring disks connecting said elements, said disks having theirperipheral portions secured in xed relation to one of said elements andtheir central portions secured in fixed relation to the other of saidelements.

5. In a vibrator'having a massive base ment and a reciprocable element,said base element 'having a hollow cylindrical portion, andsaid'vibrated element having a rod portion extending in coaxially spacedrelation through said cylindrical portion of said base element, aperipheral slot in the peripheral wall of said cylindrical portion ofsaid base element, a disk having a radial slot, said disk beinginsertable through said peripheral slot into vcoaxial relation with saidrod portion within said cylindrical portion;- means in said cylindricalportion engageable with peripheral portions of saiddisk and operable toclamp said peripheral portion of said disk in fixed coaxial relation insaid cylindrical portion, means on said rod portion to engagea centralportion of said disk in fixed relation, and means ele- Vtoapply periodicforces to said Vrod portion to move said rod portion axially relative tosaid base.

6. In a vibrator, a massive frame having an annulus at one end and atransverse portion spanning the opening of said annulus adjacent one endthereof, a plurality of spring disks in coaxial alinement with andhaving their edge portions secured in iixed relation. in said annulus toform a laminated diaphragm, alined central holes in said disks, avibrated element having a portion extending through said holes andconnected in iixed relation with the disk portions immediatelysurrounding said holes, and means operatively connected with saidtransverse portion of said frame and operable to exert pe riodic forceson said vibratable element to move same axially relative to said frameagainst the resistance of said laminated diaphragm.

7. In a vibrating material handling device, a massive reaction frame,material treating elen ment resiliently mounted for reciprocatoryvibration along an axis of said frame, a rod-like power transmittingmember extending along the axis of vibration of said element andattached thereto for vibratory movement therewith, a resilient diaphragmcoaxially surrounding said. member and having its central portion fixedwith relation to said member in supporting relation thereto and itsperipheral edges attached.y in fixed. relation to and supported by saidmassive reace tion frame.

8. In a vibrator, a massive reaction frame, a resilient diaphragmperipherally secured in fixed relation to and carried by said frame, apower transmitting rod passing coaxially through and carried by thecentral portion of said diaphragm in fixed relation, said rod beingaxially movable with relation to said frame by deiiection of saiddiaphragm, means for applying a periodic force to one end of said rod tovibrate the same axially relative to said frame and means to be vibratedattached to said rod on the opposite side of said diaphragm relative tothe point of application of said periodic force.

ALEXANDER J. ROUBAL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 604,715 Brazelton May 31, 18981,641,059 Tausch Aug. 30, 1927 1,672,807 Etzel June 5, 1928 1,846,326Flint Feb. 23, 1932 2,123,382 Rocher July 12 1938 2,153,243 Flint Apr.4,. 1939 2,187,717 Weyandt Jan. 23, 1940

